Hello, I have been stuck on these 2 questions for a while now and would appreciate any type of help from you. I have provided a screenshot of the questions through a link provided below. Thank you.
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http://i41.tinypic.com/344boev.png
http://i43.tinypic.com/1zvsc2x.png
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http://i41.tinypic.com/344boev.png
http://i43.tinypic.com/1zvsc2x.png
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For the first question the time constant is L/R, and inductance is porportional to N^2. If N is doubled, the inductance and time constant are four times as large. The answer is 1.